Appendium#44 FlatPack poi example

flatpack-excel/pom.xml

@@ -8,7 +8,6 @@
         <version>4.0.4-SNAPSHOT</version>
     </parent>
 
-
     <artifactId>flatpack-excel</artifactId>
     <name>FlatPack Excel</name>
     <packaging>bundle</packaging> <!-- (1) OSGi -->

flatpack-poi/pom.xml

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>net.sf.flatpack</groupId>
+        <artifactId>flatpack-parent</artifactId>
+        <version>4.0.4-SNAPSHOT</version>
+    </parent>
+
+
+    <artifactId>flatpack-poi</artifactId>
+    <packaging>bundle</packaging>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <name>FlatPack POI</name>
+    <description>Use poi to write to XML</description>
+
+    <properties>
+        <org.apache.poi.version>3.17</org.apache.poi.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.sf.flatpack</groupId>
+            <artifactId>flatpack</artifactId>
+            <version>4.0.4-SNAPSHOT</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.poi</groupId>
+            <artifactId>poi-ooxml</artifactId>
+            <version>${org.apache.poi.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>provided</scope>
+        </dependency>
+        <!-- Test dependencies -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.felix</groupId>
+                <artifactId>maven-bundle-plugin</artifactId>
+                <version>3.2.0</version>
+                <extensions>true</extensions>
+                <configuration>
+                    <instructions>
+                        <Export-Package>net.sf.flatpack.poi.*;version="${project.version}"</Export-Package>
+                        <Private-Package/>
+                        <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
+                        <Bundle-Version>${project.version}</Bundle-Version>
+                        <Bundle-RequiredExecutionEnvironment>J2SE-1.4</Bundle-RequiredExecutionEnvironment>
+                    </instructions>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.1.0</version>
+                <configuration>
+                    <archive>
+                        <manifestEntries>
+                            <Automatic-Module-Name>net.sf.flatpack.poi</Automatic-Module-Name>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>test-jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

flatpack-poi/src/main/java/net/sf/flatpack/poi/writer/PoiWriter.java

@@ -0,0 +1,88 @@
+package net.sf.flatpack.poi.writer;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+
+import net.sf.flatpack.writer.Writer;
+
+public class PoiWriter implements Writer {
+	private static final org.slf4j.Logger LOGGER = org.slf4j.LoggerFactory.getLogger(PoiWriter.class);
+
+	private OutputStream out;
+
+	private CreationHelper createHelper;
+	private Workbook workbook;
+	private Sheet sheet;
+
+	private List<String> columns = new ArrayList<>();
+	private Map<String, Object> currentRow = new HashMap<>();
+
+
+	public PoiWriter(OutputStream out) {
+		this.out = out;
+
+		workbook = new XSSFWorkbook();
+		createHelper = workbook.getCreationHelper();
+		sheet = workbook.createSheet("Sheet1");
+	}
+
+
+	@Override
+	public Writer printHeader() {
+		// Print the HEADER columns if it is filled
+		if (this.columns.isEmpty()) {
+			LOGGER.debug("PrintHeader :: No columns defined skipping");
+		} else {
+			Row headerRow = sheet.createRow(0);
+			for (int colIndex = 0; colIndex < this.columns.size(); colIndex++) {
+				headerRow.createCell(colIndex).setCellValue(this.columns.get(colIndex));
+			}
+		}
+		return this;
+	}
+
+	@Override
+	public Writer printFooter() {
+		return this;
+	}
+
+	@Override
+	public Writer addRecordEntry(String columnName, Object value) {
+		this.currentRow.put(columnName, value);
+		return this;
+	}
+
+	@Override
+	public Writer nextRecord() throws IOException {
+		if (columns.isEmpty()) {
+			// Create columns based on this row
+			this.currentRow.forEach((name, object) -> this.columns.add(name));
+			this.printHeader();
+		}
+
+		Row row = sheet.createRow(sheet.getLastRowNum()+1);
+		for (int colIndex = 0; colIndex < this.columns.size(); colIndex++) {
+			row.createCell(colIndex).setCellValue(currentRow.get(this.columns.get(colIndex)).toString());
+		}
+
+		return this;
+	}
+
+	@Override
+	public Writer flush() {
+		return this;
+	}
+
+	@Override
+	public void close() throws IOException {
+		workbook.write(out);
+		workbook.close();
+	}
+}

flatpack-poi/src/main/java/net/sf/flatpack/poi/writer/PoiWriterFactory.java

@@ -0,0 +1,22 @@
+package net.sf.flatpack.poi.writer;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import net.sf.flatpack.writer.Writer;
+import net.sf.flatpack.writer.WriterFactory;
+
+public class PoiWriterFactory implements WriterFactory {
+
+	OutputStream outputStream;
+
+	@Override
+	public Writer createWriter(java.io.Writer out) throws IOException {
+		return new PoiWriter(this.outputStream);
+	}
+
+	public PoiWriterFactory setOutputStream(OutputStream outputStream) {
+		this.outputStream = outputStream;
+		return this;
+	}
+}

flatpack-poi/src/test/java/net/sf/flatpack/poi/writer/PoiWriterTest.java

@@ -0,0 +1,34 @@
+package net.sf.flatpack.poi.writer;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.math.BigDecimal;
+
+import org.junit.Test;
+
+import net.sf.flatpack.writer.Writer;
+
+public class PoiWriterTest {
+
+	@Test
+	public void printHeader() throws IOException {
+		OutputStream outputStream = new FileOutputStream("test.xlsx");
+		final Writer writer = new PoiWriterFactory().setOutputStream(outputStream).createWriter(null);
+
+		writer
+				.printHeader()
+				.addRecordEntry("LASTNAME", "DOE") // New fluent
+				.addRecordEntry("ADDRESS", "1234 CIRCLE CT") //
+				.addRecordEntry("STATE", "OH") //
+				.addRecordEntry("ZIP", "44035") //
+				.addRecordEntry("FIRSTNAME", "JOHN") //
+				.addRecordEntry("CITY", "ELYRIA") //
+				.addRecordEntry("REVENUE", BigDecimal.ZERO) //
+				.nextRecord() //
+				.printFooter()
+				.flush()
+				.close();
+		outputStream.close();
+	}
+}

pom.xml

@@ -30,6 +30,7 @@
     <modules>
         <module>flatpack</module>
         <module>flatpack-excel</module>
+        <module>flatpack-poi</module>
         <module>flatpack-samples</module>
     </modules>
 
@@ -201,6 +202,15 @@
                     <autoReleaseAfterClose>true</autoReleaseAfterClose>
                 </configuration>
             </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.1</version>
+                <configuration>
+                    <useSystemClassLoader>false</useSystemClassLoader>
+                </configuration>
+            </plugin>
         </plugins>
     </build>